CN106291965A - A kind of without speckle tricolor laser light source and laser projection system - Google Patents
A kind of without speckle tricolor laser light source and laser projection system Download PDFInfo
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- CN106291965A CN106291965A CN201610725433.2A CN201610725433A CN106291965A CN 106291965 A CN106291965 A CN 106291965A CN 201610725433 A CN201610725433 A CN 201610725433A CN 106291965 A CN106291965 A CN 106291965A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/48—Laser speckle optics
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/206—Control of light source other than position or intensity
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Projection Apparatus (AREA)
Abstract
The invention discloses a kind of without speckle tricolor laser light source, including red laser module, green laser module and blue laser module；Energy-transmission optic fibre；Collimating lens；One diffusion sheet, is rotated by driven by motor；One plus lens, for converging multiple laser；One rectangular integration rod, is used for exporting uniform rectangular light spot；Also disclose a kind of laser projection system；The present invention provides unique laser dissipation spot method, carries out dissipation speckle process for the green laser that human eye is especially sensitive, and dissipation speckle effect is more significantly；The LASER Light Source without speckle provided, uses the coupling of three primary colours special optical fiber and boundling power synthetic technique, it is achieved the high brightness little etendue even ray laser of amount exports；The laser projection system provided, applies dissipation speckle LASER Light Source of the present invention, it is possible to effectively reduce the laser speckle contrast of projected picture, improves projection display imaging quality.
Description
Technical field
The invention belongs to projection display technique field, be specifically related to a kind of without speckle tricolor laser light source, and application
The laser projection system of this light source.
Background technology
Laser display technology is the forth generation Display Technique after white and black displays, colored display and numerical monitor, in conjunction with
Conventional projection display device and the feature of laser technology, have that high brightness, colour gamut be wide, color rendition degree height, life-span length, energy-conservation
The characteristics such as environmental protection.In recent years, more and more concerned in projection display technique field of LASER Light Source.
But owing to laser has high coherence, project the laser on screen and interfere light and shade phase
Between speckle, here it is speckle phenomena common in laser display, speckle can cause projection unclear as fuzzy pictures, shadow significantly
Ring image quality.
Therefore, eliminating speckle effect is the difficult point that laser display technology must pull against.
The existing LASER Light Source Speckles Technique that disappears has: utilize optical maser wavelength multiformity；Vibration screen；Vibration optical fiber；Use
The diffusion sheet of motion；Use gradient index fibre etc., but the minimizing speckle contrast effect of these methods is limited, and
Complexity and the complete machine cost of light-source system can be increased.
Summary of the invention
An object of the present invention is to provide a kind of without speckle tricolor laser light source, by special rotation diffusion sheet
Structure, effectively for the green glow that human eye is most sensitive, solves the problem such as image blurring that laser speckle effect causes.
The technical solution adopted for the present invention to solve the technical problems is: a kind of without speckle tricolor laser light source, including
Red laser module, green laser module and blue laser module, be used for sending tricolor laser；Energy-transmission optic fibre, is used for transmitting
The laser of laser instrument output；Collimating lens, for the divergencing laser collimation exported by energy-transmission optic fibre；One diffusion sheet, by electricity
Machine is rotated, and plays the effect of dissipation speckle；One plus lens, for converging multiple laser；One rectangular integration rod, uses
In exporting uniform rectangular light spot.
Described one without speckle tricolor laser light source, its laser module be semiconductor laser or solid state laser or
Optical fiber laser.
Described one is without speckle tricolor laser light source, and its energy-transmission optic fibre is Stepped-index optical fiber.
Described one is without speckle tricolor laser light source, and its diffusion sheet and incident light axis are 45 ° of placements, the one of diffusion sheet
Individual surface is coated with dichroic coating.
Described one is coated with anti-reflection film without speckle tricolor laser light source, another surface of its diffusion sheet.
Described one is without speckle tricolor laser light source, and its diffusion sheet center connects machine shaft, is driven by motor
High speed rotating.
Described one is without speckle tricolor laser light source, and its rectangular integration rod can be hollow or solid.
The two of the purpose of the present invention are to provide the laser projection system of a kind of this light source of application.
The technical solution adopted for the present invention to solve the technical problems is: a kind of without speckle tricolor laser optical projection system,
Including the above-mentioned light source of tricolor laser without speckle；Also include dmd chip；Relay lens group, is next to rectangular integration rod outfan
Afterwards, for the uniform rectangular hot spot of rectangular integration rod outgoing end face is imaged onto dmd chip；Reflecting mirror, in changing
The direction of the RGB laser beam of the system that continues output so that it is enter TIR prism；TIR prism and Philips prism, described TIR
Prism is made up of two pieces of prisms, occurs total reflection angle of incidence to change, then it is trichroism to be divided into RGB by Philips prism after light beam incidence
Light also projects on three dmd chips respectively, and three kinds of reflection of monochromatic lights are recombined colour to Philips prism by dmd chip,
Again through TIR prism outgoing；Projection lens, for being imaged onto projection screen by the DMD display device of light source lighting.
The invention has the beneficial effects as follows:
1, the present invention provides unique laser dissipation spot method, and the green laser especially sensitive for human eye is carried out at dissipation speckle
Reason, dissipation speckle effect is more significantly.
2, the LASER Light Source without speckle that the present invention provides, uses the coupling of three primary colours special optical fiber and boundling power combing skill
Art, it is achieved the high brightness little etendue even ray laser of amount exports.
3, the laser projection system that the present invention provides, applies dissipation speckle LASER Light Source of the present invention, it is possible to effectively drop
The laser speckle contrast of low projected picture, improves projection display imaging quality.
Accompanying drawing explanation
Fig. 1 is the light source one embodiment schematic diagram of tricolor laser without speckle of the present invention；
Fig. 2 is the present invention a kind of embodiment schematic diagram without the fiber coupled laser module of speckle tricolor laser light source；
Fig. 3 is the present invention another kind of embodiment schematic diagram without speckle tricolor laser light source；
Fig. 4 is that the present invention is without speckle tricolor laser optical projection system schematic diagram.
Each reference is: 1 red laser module, 2 green laser modules, 3 blue laser modules, and 4 pass energy
Optical fiber, 5 collimating lens, 6 collimating lens, 7 diffusion sheets, 8 machine shafts, 9 plus lens, 10 rectangular integrations
Rod, 11 relay lens group, 12 reflecting mirrors, 13 TIR prism, 14 Philips prisms, 15 dmd chips, 16 projections
Camera lens, 21 collimating lens, 22 plus lens, 23 diffusion sheets, 24 machine shafts, 25 rectangular integration rods, L1 is accurate
Straight lens, LD laser instrument, F1 optical fiber, L2 plus lens, M1 shaped mirror.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Specific embodiment described herein, only in order to explain the present invention, is not used to limit
The present invention.
With reference to shown in Fig. 1, a kind of without speckle tricolor laser light source, including
1, green laser module 2 of one red laser module and a blue laser module 3, be used for sending meet brightness want
The tricolor laser asked, described laser module is semiconductor laser or solid state laser or optical fiber laser.
It is connected to the energy-transmission optic fibre 4 in green laser module 2 and blue laser module 3, is used for transmitting green laser module 2
With the laser of blue laser module 3 output, described energy-transmission optic fibre 4 is Stepped-index optical fiber.
It is arranged on a collimating lens 5 at red laser module 1 rear, for by dissipating that red laser module 1 exports
Laser alignment is collimated light beam.
The corresponding collimating lens 6 of the outfan of energy-transmission optic fibre 4, for the green laser module 2 inputted by energy-transmission optic fibre 4
Converge with the laser of blue laser module 3.
Green laser module 2 and the light path converging laser optical path and red laser module 1 emergent light of blue laser module 3
Vertically, the intersection two light paths is provided with a diffusion sheet 7, is rotated by driven by motor, plays the effect of dissipation speckle, dissipates
Penetrating sheet 7 with incident light axis is 45 ° of placements, and a surface of diffusion sheet 7 is coated with dichroic coating, it is ensured that occur thoroughly after red laser incidence
Penetrating, reflect after bluish-green laser incidence, another surface is coated with anti-reflection film, to ensure more preferable transmitance.
Diffusion sheet 7 center connects machine shaft 8, drives high speed rotating by motor, by such structure, it is ensured that green sharp
Light can pass twice through high speed rotating ground diffusion sheet, effectively for the green glow of human eye sensitivity, reduces speckle contrast.
Diffusion sheet 7 rear is provided with a plus lens 9, for being converged by multiple laser.
Plus lens 9 rear is provided with a rectangular integration rod 10, is used for exporting uniform rectangular light spot, described rectangle
Integrating rod 10 is mainly used to beam homogenization and changes the shape of light source output beam, can be hollow can also be solid,
Incide the light beam in rectangular integration rod 10 to occur repeatedly to launch, export uniform rectangular light spot at rear end face.
The length of rectangular integration rod 10 is the longest, and the uniformity of output facula is the best, and the length of rectangular integration rod 10 to be taken into account
Uniformity and transmitance.
Embodiment 1
As it is shown in figure 1, be the present invention a kind of basic embodiment without speckle tricolor laser light source.
Including red laser module 1, green laser module 2 and blue laser module 3, meet brightness requirement for sending
Three primary colors laser.
Including red laser module 1, green laser module 2 and blue laser module 3 can be single laser instrument or
The laser array of multiple laser constitutions；Laser instrument can be semiconductor laser, solid state laser or optical fiber laser.
For laser array, shaped mirror can be used to carry out beam shaping to compress its etendue amount, then
Converged by lens and be coupled into optical fiber.The typical module of fiber coupled laser module as shown in Figure 2, laser array is by many
Individual identical laser LD composition (array structures of such as 2 × 4 or 3 × 4), the laser beam sent passes through collimating lens L1
After collimation, by shaped mirror M1 compression light beam bore, then it coupled to optical fiber F1 by plus lens L2.
Also include energy-transmission optic fibre 4, use Stepped-index optical fiber, for transmitting the laser that laser instrument sends, adopt meanwhile
Also contribute to beam homogenization with optical fiber structure and reduce laser speckle effect.
Red laser light beam is collimated by collimating lens 5, and green laser and blue laser are coupled into one by optical fiber
Bundle, is then collimated by collimating lens 6.
Diffusion sheet 7 and laser module 1 emergent light axis are 45 ° of placements, are coated with dichroic coating in a face of diffusion sheet 7, make HONGGUANG swash
Transmission during light incidence, bluish-green laser reflects.It is coated with antireflective coating in the b face of diffusion sheet 7.The center of diffusion sheet 7 and motor
Rotating shaft 8 is fixing to be connected, and can pass twice through high speed rotating ground diffusion sheet by such structure, green glow and blue light.Effectively for people
The green glow that eye is sensitive, reduces speckle contrast.
Then light beam is converged entrance rectangular integration rod 10 by plus lens 9, and multiple reflections occurs in rectangular integration rod,
Output end face forms uniform rectangular light spot, as the high brightness needed for Projection Display, without speckle, high uniformity illumination light.
Embodiment 2
As different from Example 1, laser module 1 is blue, and laser module 2 and 3 is HONGGUANG and green glow, a of diffusion sheet 7 simultaneously
Face is coated with dichroic coating, and transmission when making blue laser incidence, red green laser reflects, and anti-reflection film is plated in the b face of diffusion sheet 7 equally.
Embodiment 3
As it is shown on figure 3, be the present invention another kind of basic embodiment without speckle tricolor laser light source.Including: red laser mould
Block 1, green laser module 2, blue laser module 3, energy-transmission optic fibre 4, collimating lens 21, plus lens 22, diffusion sheet 23, motor
Rotating shaft 24 and rectangular integration rod 25.
Red laser module 1, green laser module 2 and blue laser module 3, meet the three former of brightness requirement for sending
Color laser.RGB laser module 1,2,3 can be the laser array of single laser instrument or multiple laser constitution.Swash
Light device can be semiconductor laser, solid state laser or optical fiber laser.For laser array, trapezoidal reflection can be used
Mirror carries out beam shaping to compress its etendue amount, is then converged by lens and is coupled into optical fiber.
Also include energy-transmission optic fibre 4, use Stepped-index optical fiber, for transmitting the laser that laser instrument sends, adopt meanwhile
Also contribute to beam homogenization with optical fiber structure and reduce laser speckle effect.
The three beams of laser fibre bundle 4 that laser module 1,2 and 3 exports respectively is bundled, is triangularly arranged, three
Respective corresponding collimating lens 21 after root fiber-optic output, three each and every one collimating lens 21 in a plane, plus lens 22
It is placed on collimating lens rear.Three beams of laser bundle is converged by a plus lens 22 after each self-corresponding collimating lens 21 collimates
Poly-.
Diffusion sheet 23 and incident light axis are 45 ° of placements, are coated with reflectance coating in a face of diffusion sheet 23, make RGB laser enter
Reflect after penetrating.It is coated with antireflective coating in the b face of diffusion sheet 23.The center of diffusion sheet 23 is fixing with machine shaft 24 to be connected,
By such structure, RGB laser can pass twice through high speed rotating ground diffusion sheet, reduces laser speckle contrast effect more
Add notable.
Rectangular integration rod 25 is positioned at the focal position of converging beam, and light beam occurs multiple reflections in rectangular integration rod,
Output end face forms uniform rectangular light spot, as the high brightness needed for Projection Display, without speckle, high uniformity illumination light.
Embodiment 4
As shown in Figure 4, it is a kind of basic embodiment of laser projection system of the present invention.
Including the light source of tricolor laser without speckle described in embodiment 1, also include relay lens group 11, reflecting mirror 12,
TIR prism 13, Philips prism 14, dmd chip 15 and projection lens 16, dmd chip 15 is micromirror arrays device,
It it is DLP display part core；After relay lens group 11 is next to rectangular integration rod 10 outfans, for by rectangular integration rod 10
The uniform rectangular hot spot of outgoing end face is imaged onto on dmd chip 15, and reflecting mirror 12 is for changing the RGB of relay system output
The direction of laser beam so that it is entering TIR prism 13, described TIR prism 13 is made up of two pieces of prisms, occurs complete after light beam incidence
Reflection angle of incidence changes, then is divided into RGB tri-coloured light by Philips prism 14 and projects on three dmd chips 15 respectively, DMD
Three kinds of reflection of monochromatic lights to Philips prism 14 are recombined colour by chip 15, then through TIR prism 13 outgoing；Projection lens
16 for being imaged onto projection screen by the DMD display device of light source lighting.
In technique scheme, relay lens group is made up of two or more lens, can be sphere or aspheric surface saturating
Mirror, is amplified on DMD display chip by a certain percentage by the rectangular light spot that rectangular integration rod rear end face exports；TIR prism,
The partially reflecting surface of Philips prism meets total reflection condition, and the angle of TIR prism Philips prism calculates through precision
Obtain, meet color separation, close color and the requirement of DMD micro mirror array.
After relay lens group 11 is next to rectangular integration rod outfan, uniform for by rectangular integration rod outgoing end face
Rectangular light spot is imaged onto on DMD；Reflecting mirror 12 is for changing the direction of the RGB laser beam of relay system output so that it is enter
TIR prism 13；TIR prism 13 is made up of two parts, occurs total reflection angle of incidence to change after light beam incidence, then by Philips rib
Mirror 14 is divided into RGB tri-coloured light and projects on three DMD respectively, and three kinds of reflection of monochromatic lights are again closed by DMD to Philips prism
Become colour, then through TIR prism outgoing；Three RGB display chip DMD are respectively placed in going out of the red blue beam of Philips prism
Penetrating face, dmd chip 15 is green glow display element, and red blue light display chip DMD is not drawn in the drawings；Projection lens 16 will be for swashing
The DMD display device of radiant illumination is imaged onto on projection screen, display is amplified, image clearly.
In the laser projection system of the present invention, tricolor laser light source is processed by special dissipation speckle, by laser coherence
The laser speckle effect that property causes will substantially reduce.
Embodiment 5
Unlike above-described embodiment 3, the laser light without speckle described in LASER Light Source use case 2 of laser projection system
Described in source, relay lens group, TIR prism 13 and Philips prism 14, dmd chip 15 and projection lens 16 and case 3 one
Cause.
It should be appreciated that for those of ordinary skills, can be improved according to the above description or be converted,
And all these modifications and variations all should belong to the protection domain of claims of the present invention.
Claims (8)
1. one kind without speckle tricolor laser light source, it is characterised in that: include
Red laser module (1), green laser module (2) and blue laser module (3), be used for sending tricolor laser；
Energy-transmission optic fibre (4), for transmitting the laser of laser instrument output；
Collimating lens (5,6), for the divergencing laser collimation exported by energy-transmission optic fibre (4)；
One diffusion sheet (7), is rotated by driven by motor, plays the effect of dissipation speckle；
One plus lens (9), for converging multiple laser；
One rectangular integration rod (10), is used for exporting uniform rectangular light spot.
The most according to claim 1 a kind of without speckle tricolor laser light source, it is characterised in that described laser module is
Semiconductor laser or solid state laser or optical fiber laser.
The most according to claim 1 a kind of without speckle tricolor laser light source, it is characterised in that described energy-transmission optic fibre
(4) it is Stepped-index optical fiber.
The most according to claim 1 a kind of without speckle tricolor laser light source, it is characterised in that described diffusion sheet (7)
Being 45 ° of placements with incident light axis, a surface of diffusion sheet (7) is coated with dichroic coating.
The most according to claim 4 a kind of without speckle tricolor laser light source, it is characterised in that described diffusion sheet (7)
Another surface is coated with anti-reflection film.
The most according to claim 1 a kind of without speckle tricolor laser light source, it is characterised in that described diffusion sheet (7)
Center connects machine shaft (8), drives high speed rotating by motor.
The most according to claim 1 a kind of without speckle tricolor laser light source, it is characterised in that described rectangular integration rod
(10) can be hollow or solid.
8. a laser projection system, it is characterised in that: include the light source of tricolor laser without speckle described in right 1 to 7；Also wrap
Include
Dmd chip (15)；
Relay lens group (11), after being next to rectangular integration rod (10) outfan, for by rectangular integration rod (10) exit end
The uniform rectangular hot spot in face is imaged onto on dmd chip (15)；
Reflecting mirror (12), for changing the direction of the RGB laser beam of relay system output so that it is enter TIR prism (13)；
TIR prism (13) and Philips prism (14), described TIR prism (13) is made up of two pieces of prisms, sends out after light beam incidence
Raw total reflection angle of incidence changes, then is divided into RGB tri-coloured light by Philips prism (14) and projects three dmd chips respectively
(15), on, three kinds of reflection of monochromatic lights are recombined colour to Philips prism (14) by dmd chip (15), then through TIR prism
(13) outgoing；
Projection lens (16), for being imaged onto projection screen by the DMD display device of light source lighting.
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| CN201610725433.2A CN106291965B (en) | 2016-08-26 | 2016-08-26 | A kind of no speckle tricolor laser light source and laser projection system |
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| CN201610725433.2A CN106291965B (en) | 2016-08-26 | 2016-08-26 | A kind of no speckle tricolor laser light source and laser projection system |
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| CN106773490A (en) * | 2017-01-17 | 2017-05-31 | 上海蔚来汽车有限公司 | Optical texture, optical system and optical means for eliminating laser projection speckle |
| CN106950712A (en) * | 2017-05-19 | 2017-07-14 | 中国科学院理化技术研究所 | XY axles independently eliminate laser speckle device, LASER Light Source and laser display system |
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Address after: 430223 No. 9 Ming Ze street, mien Shan development area, Jiangxia District, Wuhan, Hubei Applicant after: Jiuzhiyang Infrared System Co., Ltd. Address before: 430223 Jiangxia City, Wuhan province sunshine road, No. 717, Applicant before: Jiuzhiyang Infrared System Co., Ltd. |
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